Make the superuser flag bypass TLD access checks

The --superuser command in the nomulus command-line tool should be
bypassing checks on whether the passed-in registrar client ID has access
to the TLD in question, but currently it is not.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=158974462

java/google/registry/flows/domain/DomainCheckFlow.java

@@ -136,11 +136,10 @@ public final class DomainCheckFlow implements Flow {
       // This validation is moderately expensive, so cache the results.
       domains.put(targetId, domainName);
       String tld = domainName.parent().toString();
-      if (seenTlds.add(tld)) {
+      boolean tldFirstTimeSeen = seenTlds.add(tld);
+      if (tldFirstTimeSeen && !isSuperuser) {
         checkAllowedAccessToTld(clientId, tld);
-        if (!isSuperuser) {
-          verifyNotInPredelegation(Registry.get(tld), now);
-        }
+        verifyNotInPredelegation(Registry.get(tld), now);
       }
     }
     ImmutableMap<String, InternetDomainName> domainNames = domains.build();